im having this problem with my laptop i reformat the hardrive and upgrade from xp home to pro edition it works fine at first and then wen i shutdown and restart again there was no xp in the hard drive so i went to reinstall the xp and it came up as no hard disk drive found and cannot install o/s............please help
Is the hard drive in your laptop a SATA (Serial ATA) har drive? Windows XP does not natively support SATA drives. Your XP Home may have had the SATA drivers installed by the manufacturer. In the BIOS you should be able to change the setting to IDE from SATA, and access your harddrive if it appears. When you installed Windows XP Professional you should have pressed the F6 key and supplied the ACHI driver on a floppy drive.